Question

Magnifying power of a telescope can be increased by

• A. increasing focal length of the system
• B. fitting eyepiece of high power
• C. fitting eyepiece of low power
• D. increasing the distance of objects

Answer 1

The correct option is B fitting eyepiece of high power

Magnifying power of the telescope is given as:

$m=\frac{f_o}{f_e}=\frac{P_e}{P_o}$

So, by increasing the power of the eyepiece, magnifying power of the telescope can be increased.

Hence, option $\left(B\right)$ is correct.